Limit switch contact assemblies -...

Model Overview

ARMATURENBAU GmbH MANOTHERM Beierfeld GmbH

9.100010/11

Limit switch contact assemblies

Heading 9.1

2 AB/MT 9.1000 10/11

ARMATURENBAU GmbH & MANOTHERM Beierfeld GmbHQuality MADE IN GERMANY

ContentsFollowing you will fi nd a model overview of our limit switch contact assemblies of catalogue heading 9.

Defi ntions, application and functions for the particular models of limit switch contact as-semblies are described in this model overview, generally and in detail. You will get more detailed information concerning the selection, switching functions and minimum spans, operating conditions, Ex-protection, technical data, options and others.

Further information can also be found in DIN 16 085.

Furthermore heading 9 comprises electrical additional accessory as pressure transmitters and digital displays, detailed documentation concerning this is available upon request.

Details as dimensional drawings, electrical connections as well as information concerning the order code and options can be found on the data sheets of the corresponding instrument model with the fi nal number .90.

Information on accessory as relays and more can be found on the next pages and the data sheets that are stated there.

Limit switch contact assemblies general information p. 3 – 4

Switching functions and minimum spans p. 5

Limit switch contact assemblies in detail p. 6 – 11

The complete catalogue with annual updates is also available as CD-ROM.

Catalogue Headings

Heading 1 Bourdon tube pressure gauges

Heading 2 Bourdon tube test gauges

Heading 3 Diaphragm pressure gauges (horizontal)

Heading 4 Diaphragm pressure gauges (vertical)

Heading 5 Duplex- and differential pressure gauges

Heading 6 Capsule gauges for low pressure

Heading 7 Chemical seals

Heading 8 Temperature measuring instruments

Heading 9- Limit switch contact assemblies- Pressure transmitters and digital displays

Heading 10 Pressure gauge test equipment

Heading 11 Accessory Model overviews and data sheets can be found on the

internet on http://armaturenbau.com resp. http://manotherm.com

ARMATURENBAU GmbH • MANOTHERM Beierfeld GmbH

Katalog Deutsch / Englisch • Stand Mai 2011German / English Catalogue • Edition May 2011

Zertifi kate

GOST-type certifi cation Russia

GOST-R for customs purposes Russia

GOST- type certifi cation Ukraine

GOST- type certifi cation Kazakhstan

DIN EN ISO

9001

Qua

litym

anagement

AB/MT 9.1000 10/11 3

Limit switch contact assemblies general information

Defi nitionsContact load

Allowed maximum values of the electrical load of a contact.

Switching pressure

The switching pressure is the pressure of the medium at the point of time of activating the switching function. (reference: DIN 16 085)

Switching point

The switching point is the scale value at which the swicthing function is being activated.

Switching direction (direction of action of the switching function)

The switching direction is marked by the movement of the actual value pointer at which the switching operation proceeds-> clockwise switching direction at rising pressure and-> anticlockwise switching direction, at falling pressure

Switching functionWe have defi ned 3 switching functions

Making contact (code number 1)

At clockwise pointer-movement the con-nected circuitry is being closed when ex-ceeding the preset limit value.

Breaking contact (code number 2)

At clockwise pointer movement the con-nected circuitry is being opened when exceeding the preset value.

Change-over contact(code number 3)

When exceeding the preset limit value a circuitry is being opened and another circuitry is being closed at the same time (resp. directly one after the other).

see „switching functions“ on page 5

Switching accuracy (accuracy of the switching operation)

The switching accuracy indicates the deviation of the switching pressure of the preset limit value in the defi ned switching di-rection. According to DIN 16 085 it may not exceed the 1.5-fold of the error limits of the pressure measuring instrument.

Switching difference

The switching difference is the difference between the swit-ching points of two limit values.The minimum span between two switching points is the mini-mum possible switching difference.

Switching pressure reversal error (switching hysteresis)

„The switching pressure reversal error is the span up to the point of time of the activating of the switching function of a contact at rising or falling pressure, but unchanged reference value of the switching pressure.“ (reference: DIN 16 085)

Application

Limit switch contact assemblies are for the opening or closing of electrical circuitries or pneumatic switching circuits.

Limit switch contact assembliesWe differ the following models:

Model

1. Direct (electromechanical) 1.1 Standard contact S 1.2 Magnetic contact M 1.3 Micro switch MS

2. Indirect (contactless) 2.1 Electronic contact E 2.2 Inductive contact I 2.3 Pneumatic contact P 2.4 Reed contact R 2.5 e-Gauge eG

FunctionThe limit switch contact assemblies are constructed in the manner that the actual value pointer can work on over and above the li-mit setting pointer after the limit value signalling. The limit setting pointers can be adjusted over the whole scale range. Please regard the information and recommendations below „Adjustment ranges of the contacts“ (page 4).

The limit setting pointer is set to the value at which the switching operation should happen, externally by the removable key. For limit switch contact assemblies of NCS 63 with reed contact an adjust-ment usually happens manually after removal of the bayonet ring. For the e-Gauge® the reference values are being programmed.

For limit switch contact assemblies with 1 and 2 contacts determi-nations according to DIN 16 085 (pressure gauges) and DIN 16 196 (thermometers) are valid.

Furthermore we also deliver limit switch contact assemblies with 3 or 4 contacts. Adjustments regarding adjustment ranges, switching hysteresis and adjustment one above the other are required in this case.

Information on this and deliverable limit switch contact assemblies can be found on data sheets with the fi nal number .90 or can be requested.

actual value pointer

key for adjusting mechanism(in holder)

limit setting pointer

adjusting mechanism

4 AB/MT 9.1000 10/11

Limit switch contact assemblies general information

Information in an orderFor an optimal function of the instruments with limit switch con-tact assemblies you should specify additionally to the ordering code:

- the switching pressure/s

- the switching range/s, in which the contact/s are being adjusted, if it is beyond the adjustment ranges that are defi ned by us

- if an anticlockwise switching direction is requested

Detailed instructions concerning the ordering information can be found on the data sheets of the particular instrument model with the ending .90.

Special pressure gauges with limit switch contact assemblies

Model: RChE Case: stainless steelRing: snap-in window (turnable)Special equipment: construction type according to EN 562 tested, 1x inductive contact, I1 according to EN ICE 60 497-5-6 connection ¼“ NPTData sheet: 1231-9.2

Model: RChg, RChgOe, RChgN Case: stainless steelRing: crimped-on ring, staineless steelSpecial equipment: Gas density monitor for SF6-gas, gives alarm, if leakage occurs. The instruments are being adjusted for the particular case of application to calibration pressure, switch points and ambient temperature.Data sheet: 1902Model: RCh100/160 with e-Gauge® RChG100/160 with e-Gauge® Case: stainless steelRing: bayonet ring, stainless steelSpecial equipment: The e-Gauge® operates absolutely contactless and makes a „normal“ indicating instrument with NCS 100/160 to a multifunctional instrument with 2 digital switching outputs and an analogue output signal of 4-20 mA.Data sheet: 1201.93

Information concerning the selectionMounting options of limit switch contact assemblies

Pressure gauge-/ thermometer model Nominal case size

• Bourdon tube pressure gauges 63, 100, 160, 96x96, 144x144

• Differential pressure gauges 100, 160

• Diaphragm pressure gauges 100, 160

• Capsule gauges for low pressure 100 (only e-Gauge)

• Gas-actuated thermometer 100, 160, 96x96, 144x144

Adjustment ranges of the contacts

Standards DIN 16 085 (pressure gauges) and DIN 16 196 (thermometers) are valid in connection with instrument norms EN 831–1/–3 (pressure gauges) resp. EN 13 190 (thermometers).As further forces occur at pressure gauges / thermometers with limit switch contact assemblies, the range in which limit switch con-tact assemblies should work optimal and should be adjusted ex works, according to the standards that we have defi ned as follows:

Limit switch contact assemblies with 1 contactadjustment ranges:S/E/I/P-contact 10 - 90 % ( ) M-contact 15 - 85 % (----)

Limit switch contact assemblies with 2 contactsS/E/I/P-contacts adjustment range both limit values 10-90 %

Limit switch contact assemblies with 2 contactsM-contacts adjustment ranges 1. contact 15-70 % ( ) 2. contact 30-85 % ( )

Beyond the named ranges larger switching inaccuracies and lar-ger or minor switching pressure reversal errors have to be faced. For magnetic contacts it is very problematic, because if the magnetic forces are decreased at the adjustment, the defi ned maximum contact load can not be fully used. For magnetic contacts it is generally not possible to combine a maximum contact load with a minimum skipping behaviour (minor magnetic force).

Switching differenceThe switching difference between two switch points has to be larger than the switching pressure reversal error and for magnetic contacts additionally larger than the skipping behaviour, so that a secure differentiation of the switch points is possible.

In practice we recommend

Limit switch contact as-semblies

Switching function

Switching difference

S, E, I, P 11, 22> switching pressure reversal error

12, 21 ≥ 2% of the span

M 11, 22 ≥ 6% of the span

12, 21 ≥ 12% of the span

Minimum spanPlease also regard the minimum spans for the particular instrument models (see page 5) that depend amongst others on the directive force of the measuring unit.

Special solutions

If your operating conditions are beyond these limits, please do not hesitate to contact us and we will work on an individual solution that is adjusted to your conditions.

AB/MT 9.1000 10/11 5

Switching functions / minimum spans

Minimum spansModel limit switch contact assembly

measuring instrumentmeas. unit

number of the contacts1 2 3 4

S (standard contact)

bourdon tube pressure gauges

NCS 63 bar upon request upon request — —NCS 100, 96² bar 1.0 1.6 2.5 upon requestNCS 160, 144² bar 1.0 1.6 2.5 2.5

differential pressure gauges1) DiRZ...160 bar 1.0 1.6 upon request —

diaphragm pressure gauges

NCS 100, flange-Ø 160 mbar 60 100 160 160NCS 100, flange-Ø 100 bar 0.6 0.6 0.6 0.6NCS 160, flange-Ø 160 mbar 60 100 160 160NCS 160, flange-Ø 100 bar 0.6 0.6 0.6 0.6

thermometers NCS 100, 160 °C no minimum span for standard pressure ranges

M (magnetic contact)


NCS 63 bar 2.5 4.0 — —NCS 100, 96² bar 1.6 2.5 4 upon requestNCS 160, 144² bar 1.6 2.5 4 4



NCS 100, flange-Ø 160 mbar 100 160 250 250NCS 100, flange-Ø 100 bar 0.6 0.6 2.5 2.5NCS 160, flange-Ø 160 mbar 100 160 250 250NCS 160, flange-Ø 100 bar 0.6 0.6 2.5 2.5


E (electronic contact)

bourdon tubepressure gauges

NCS 63 bar 2.5 4.0 — —NCS 100, 96² bar 1.0 1.6 2.5 upon requestNCS 160, 144² bar 1.0 1.6 2.5 upon request


diaphragm pressure gaugesflange-Ø 160 mbar 60 60 60 upon requestflange-Ø 100 bar 0.6 0.6 0.6 upon request


I (inductive contact)


NCS 63 bar 2.5 4.0 — —NCS 100, 96² bar 1.0 1.6 2.5 upon requestNCS 160, 144² bar 1.0 1.6 2.5 upon request


diaphragm pressure gaugesflange-Ø 160 mbar 60 60 60 upon requestflange-Ø 100 bar 0.6 0.6 0.6 upon request


P (pneumatic contact)

bourdon tube pressure gauges NCS 100, 96² bar 1.0 — — —NCS 160, 144² bar 1.0 1.6 — —


NCS 100, flange-Ø 160 mbar 60 — — —NCS 100, flange-Ø 100 bar 0.6 — — —NCS 160, flange-Ø 160 mbar 60 60 — —NCS 160, flange-Ø 100 bar 0.6 0.6 — —

R (Reed contact) bourdon tube pressure gauges RSCh 63, RCha 63 bar 2.5 2.5 — —MS (Mikroschalter) bourdon tube pressure gauges NCS 100 bar 2.5 upon request — —

eG (e-Gauge)bourdon tube pressure gauges RCh / RChG 100 bar 0.6 0.6 — —capsules KPCh / KPChG 100/160 mbar 100 100 — —thermometers TBiSCh / TBiGelCh 100/160 °C no minimum span for standard pressure ranges

1) differential presure gauges with diaphragm upon request

Switching functions (for clockwise pointer movement, that means direction of action of the switching function is rising pressure for pressure gauges):

1 contactstandard /magnetic S, M

electronic / E inductive I pneumatic P Reed R micro switch MS e-Gauge eG

breaking contact

S2 M2 E2 I2 P2 R2 –

making contact

S1 M1 E1 I1 P1 R1 –

singlechange-over

standard- /magnetic S, M

micro switch MS

S3 M3 MS3

2 contacts1) standard- /magnetic S, M

electronic E inductive I pneumatic P Reed R micro switch MS e-Gauge eG

1. and 2. breaking contact

S22 M22 E22 I22 s.u. 2) R22 – eG22

1. breaking cont.2. making cont.

S21 M21 E21 I21 P21 R21 – eG21

1. and 2. making contact

S11 M11 E11 I11 s.u. 3) R11 – eG11

1. making cont.2. breaking cont.

S12 M12 E12 I12 P12 R12 – eG12

1) order of the clockwise contacts 2) available by plugging the hose bridges of P21 3) available by plugging the hose bridges of P12

ws = white / bn = brown / gb = yellow / gn = green

Limit switch contact assemblies in detail

6 AB/MT 9.1000 10/11

Limit switch contact assembly S Limit switch contact assembly M

Function • For limit switch contact assemblies with standard contacts the construction for limit value signalling con-sists of an adjustable limit setting pointer, connected with the sustainer that holds a contact pin and the wi-per that is moved by the actual value pointer.• The switching operation happens when the actual value pointer and the limit setting pointer are exactly one above the other.• The contact pins get in contact or are being separated.• The torque which is effective on the actual value pointer is low, so that the contacts switch exactly at the preset reference value.

• For limit switch contact assemblies with magentic contacts there is, compared to limit switch contact as-semblies with standard contacts, a screwable perma-nent magnet, which is protected by locking varnish, installed at the sustainer of the limit setting pointer.• The permanent magnet reinforces the contact pres-sure and prevents the contacts from deflagrating by arc load influences. • The contact making accelerates when approaching the contacts, respectively is being decelerated when separating the contacts. This skipping behaviour could amount 2 to 5 % of the span, depending on the direc-tive force of the measuring element and the adjusted magnetic force.

Application / operating conditions

Standard contacts are suitable if, • the instrument is being installed vibration-free and no pulsations do occur, as otherwise accidental swit-chings could happen.• the contact pins are not being contaminated or do not oxidise, e.g. by aggressive atmosphere.

Technical data see page 8

Magnetic contact are applicable almost everywhere, as they are widely unsusceptible against vibrations. • Breaking capacity, switching safety and contact load are explicitly higher than for standard contacts.


Installation in case-Ø (NCS)

63, 100, 160, 96x96, and 144x144 63, 100, 160, 96x96, and 144x144

Case filling • Limit switch contact assemblies with standard contacts can only be applied with instruments without case filling.

• Limit switch contact assemblies with magnetic contacts are, using a multifunctional relay of the type series MSR (see below) only suitable to a limited extend.

Relay Impulse-controlled multifunctional relays of the type series MSR• increase the switching safety and make a higher fre-quency of operation possible, that is at risk of external influences as e.g. aggressive atmosphere, pollution or oxidation of the contact pins• minimise the contact load• reduce accidental switchings by vibration / pulsation by an integrated delayed release of 450 ms.

• details see data sheet 9521

Impulse-controlled multifunctional relays of the type series MSR• should be used for instruments with case filling. They minimise the risk of oil contamination by the arc load.• increase the switching safety and make a higher fre-quency of operation possible, that is at risk of external influences as e.g. aggressive atmosphere, pollution or oxidation of the contact pins.• minimise the contact load• reduce accidental switchings by vibration / pulsation by an integrated delayed release of 450 ms.

• details see date sheet 9521

Ex-protection –

–


sustainer

contact pin


sustainer

contact pinmagnet

S

M

AB/MT 9.1000 10/11 7


Limit switch contact assemblies E Limit switch contact assemblies I

Function • For limit switch contact assemblies with electronic contacts the construction for limit value signalling con-sists of a proximity switch with integrated switch amp-lifiers (PNP-output) and a control lug.• The proximity switch is mounted on a sustainer that is connected to the reference value, while the control lug is being moved by the actual value pointer.• If the control lug dips into the proximity switch, the contact is being closed. If the control lug drops out, the contact is being opened.• The switching operation takes place when the control lug is positioned in the middle of the proximity switch.• The torque which is effective on the actual value pointer with the control lug is low, so that the switching operation happens exactly at the preset reference va-lue.

• For limit switch contact assemblies with inductive contacts the construction for limit value signalling con-sits of a proximity switch (displacement transducer ac-cording to DIN EN 60 947-5-6 (NAMUR)), a control lug and a relay in downstreamed switch amplifier (applica-tion in potentially explosive areas) or a multifunctional relay of the type series MSR-I (application in potenti-ally explosive areas). Switch amplifiers resp. multifunc-tional relays do not belong to the delivery scope of an instrument with inductive contact. • The displacement transducer is mounted to a susta-iner which is connected to a limit setting pointer, whi-le the control lug is being moved by the actual value pointer. • Basically the proximity switch is a transistor-oscillator whose oscillator coils are arranged to both sides of the proximity switch.• If the control lug dips into the proximity switch, the relay in the downstreamed switch amplifier releases and the contact is being openened. If the control lug drops out, the relay operates and the contact is being closed. • The torque which is effective on the actual value poin-ter with the control lug is low, so that the switching ope-ration happens exactly at the preset reference value.


Electronic contacts are suitable for every industrial application.• They are less susceptible against accidental swit-chings by vibration / pulsation than standard contacts.• They are wear resistant (contactless switching) and corrosion-free (all electrical components are moulded waterproof in a plastic case in cast resin). • As the proximity switch is a 3-wire proximity switch with PNP-switching input, an SPS, an optocoupler and other electronical evaluation units with slight voltages and currents can be activated directly.


Inductive contacts in connection with our multifunc-tional relays of the type series MSR-I are suitable for every industrial application.• They are wear resistant (contactless switching) and corrosion-free (all electrical components are moulded waterproof in a plastic case in cast resin).• Proximity switches up to SIL 2 are applicable accor-ding to IEC 61 508.



63, 100, 160, 96x96, and 144x144 63, 100, 160, 96x96, and 144x144

Case filling Limit switch contact assemblies with electronic contacts can be applied for instruments with case filling.

Limit switch contact assemblies with inductive contacts can be applied for instruments with case filling.

Relay–

Impulse-controlled multifunctional relays of the type series MSR-I• are applied in plants where no Ex-protecion is required• reduce accidental switchings / pulsation by an inte-grated switching delay of 450 ms

• details see data sheet 9531

Ex-protection – • When using our switch amplifiers KF..-SR2-..the equipment corresponds to the type of protection intrinsic safety i. It has the classification II2G EExia IIC T6 and is approved for the application in potentially explosive areas.• The switch amplifiers have to be installed beyond the potentially explosive area.• CE-Type Examination Certificates of the Federal Technical Institute (Phyiskalisch Technische Bun-desanstalt = PTB) on the intrinsic safety of the used proximity switches are available.• The allowed lead between limit switch contact as-sembly and downstream unit is in consideration of the intrinsic safety according to PTB approximataly 3 km.• CE-Type Examination Certificates can be found on the internet on www.armaturenbau.com respectivelywww.manotherm.com in the download area or upon request.• Details (switch amplifiers) see data sheet 9532

E

I


8 AB/MT 9.1000 10/11

Limit switch contact assemblies S Limit switch contact assemblies M

Technical data without case filling with case fillingElectrical Rated insulation voltage: 250 V 250 V

Rated operational voltage: 230 V AC (mains) 230 V AC (mains)Rated operational current: max. 0.6 A max. 0.6 A max. 90 mAMaking- / breaking current: max. 0.7 A max. 1.0 ABreaking capacity: 10 W / 18 VA 30 W / 50 VA 20 W / 20 VA

Measurement technique

Switch. pressure reversal error: ≤ accuracy class accuracy classes plus 2 - 5 % of the spanSwitching accuracy: ≤1.5 x accuracy class ≤1.5 x accuracy classAmbient temperature: -20 °C...+70 °C -20 °C...+70 °C

Contact material silver-nickel, silver-nickel,10µ gold-plated 10µ gold-plated(AG80NI20Au10µ) (AG80NI20Au10µ)

Minimum values for contact load for instruments without case filling for ohmic loadRated operational voltageUeff min.

24 V 24 V

Breaking capacity (DC, AC)

0.4 W 0.4 W

CE-marking Measuring instruments with limit switch contact as-semblies with standard contacts are basically marked with the CE-sign for electromagnetic compatibility and the low voltage directives.

Measuring instruments with limit switch contact as-semblies with magnetic contacts are basically marked with the CE-sign for electromagnetic compatibililty and the low voltage directives.

Options • More than 2 contacts, see data sheet of the correspon-ding instrument model with the final number .90. There you will find information concerning the „one above the other adjustment“ of the limit setting pointers• Separated circuitries• Double change-over contact S 33• Wire break control (parallelly connected resistance for each contact)

• More than 2 contacts, see data sheet of the correspon-ding instrument model with the final number .90. There you will find information concerning the „one above the other adjustment“ of the limit setting pointers• Separated circuitries• Double change-over contact M 33• Wire break control control (parallelly connected resistance for each contact)

Recommended contact load for instruments without case filling for ohmic and inductive loadVoltage according to

DIN IEC 60 038DC AC DC AC cosφ>0.7 DC AC cosφ>0.7

220 V 230 V 40 mA 45 mA 25 mA 100 mA 120 mA 65 mA110 V 110 V 80 mA 90 mA 45 mA 200 mA 240 mA 130 mA 48 V 48 V 120 mA 170 mA 70 mA 300 mA 450 mA 200 mA 24 V4) 24 V 200 mA 350 mA 100 mA 400 mA 600 mA 250 mA

AB/MT 9.1000 10/11 9


Limit switch contact assemblies E Limit switch contact assemblies I

Technical dataElectrical Rated operational voltage: 10...30 V DC Rated operational voltage:: 5...25 V DC

Breaking capacity: ≤ 100 mA Breaking capacity: 8 V DCCurrent consumption: max. 3 mA


Switching pressure reversal error: ≤ accuracy class Switching pressure reversal error: ≤ accuracy classSwitching accuracy: ≤1.5 x accuracy class Switching accuracy: ≤1.5 x accuracy classAmbient temperature: -25 °C...+ 70 °C Ambient temperature: -20 °C...+ 70 °C

-SN-/S1N version (see options): -40 °C...+100 °C

CE-marking Measuring instrument with limit switch contact assem-blies with electronic contacts are basically marked with the CE-sign for electromagnetic compatibility.

Measuring instruments with limit switch contact assem-blies with inductive contacts are basically marked with the CE-sign for the ATEX-standard.

Options • More than 2 contacts, see data sheet of the corre-sponding instrument model with the final number .90. There you will find information concerning the „one above the other adjustment“ of the limit setting pointers• PNP switching output as 2-wire connection.

• More than 2 contacts, see data sheet of the corre-sponding instrument model with the final number .90. There you will find information concerning the „one above the other adjustment“ of the limit setting pointers• NCS 160 with 2 contacts in intervalI switching, abso-lutely reactionless function, especially suitable for test gauges class 0.6.For this construction type the control lug is on the actual value pointer. When using the switch amplifier that has especially been developed for this limit switch contact assembly KFA6-SR2-Ex2.W.IR it is granted that even when exceeding the preset minimum- resp. maximum limit values the particular switching function is being preserved. So the control lug can exceed the preset reference value, evacuate the proximity switch and dip into it once again when declining without changing of the switching condition. Also a power failure effects no change. After recovery of the power supply the last given switching condition is restored.• Safety version (SN) applicable in connection with switch amplifier instru-ments in safety engineering (see Technical Information Sheet T03-000-041) for development of monitoring control (safety switching). If an error occurs, if at the proximity switch or at the switch amplifier, the initial condition is mandatory „0“. The conception of these safety switches has been tested and approved by the TÜV (Technical Inspec-tion Authority) for important switchings according to the safety-related requirements. The electrical characteristic values correspond to DIN EN 60 947-5-6 (NAMUR).• Safety version with contrary direction of action (S1N)


10 AB/MT 9.1000 10/11

Limit switch contact assemblies P Limit switch contact assemblies R

Function • For limit switch contact assemblies with pneumatic contacts the construction for limit value signalling con-sists of a stream-diffuser-system, a control lug and a pneumatic low pressure switch (PP-transformer).• The stream-diffuser system consists of a sustainer which is connected to the limit setting pointer while the control lug is being moved by the actual value pointer.• In this system a reduced, permanently streaming air flow is being conducted from the jet nozzle into the dif-fuser. The low pressure signal (>25 mbar) that is being adjusted by the diffuser, is being conducted to the pre-amplifier of the low pressure switch. This effects that the micro switch connects the hose connections and produces an actuated output-signal of 1.4 bar at the output.When the actual value pointer reaches the limit setting pointer, the control panel, which is being taken by the actual value pointer, interrupts the air flow in a stream-diffuser-system. By failure of the low pressure signal at the pre-ampli-fier, now the switching is being released. The micro switch moves backwards into initial position and vents the connection.

• The reed contact is a fast bistable special switch that can be applied for switching of low-level signals in the mV- resp. µA-range.• It consists of 2 contact studs made of ferromagnetic material which are remelted hermeticallly dense in a glass tube under inert atmosphere and are mounted turnable on a conductor plate behind the dial. When approaching a sufficiently strong magnetic field at the actual value pointer, both contact studs make use of a reversal polarity and activate the contact with this. • A permanent magnet behind the glass tube makes sure that the switching function is preserved when the actual value pointer moves on.

• Manual adjustment of the reference values after removal of the bayonet ring. For case configurations Fr and rFr external by removable key.


• Pneumatic contacts stand out due to high switching accuracy and are absolutely unsusceptible against vi-brations.

Compared to electromechanical contacts (S, M) reed contacts have the following advantages • Contactless switching at reliable contact making • Small dimensions


100, 160, 96x96, und 144x144 63

Case filling • Limit switch contact assemblies with pneumatic contacts do not work in liquid-filled instruments (air flow).

• Limit switch contact assemblies with reed contacts can only be applied for instruments without case filling

Ex-protection Limit switch contact assemblies with pneumatic contacts are absolutely explosion-resistant, suitable for zone 0.

Possible when using intrinsically safe switch amplifiers as it is about passive electrical equipment without storage properties.

No marking according to ATEX, but a declaration by the manufacturer is available.

Technical data Air consumption: < 30 l/h PP-transformer: <40 Nl/h at 1.4 barOperating air pressure: 1.4 bar ±0.1 barPurity specification at control air: < 0.04 mmMech. durability: PP-transformer: approx.108 switching cycle

Breaking capacity max.: 10 W / 10 VASwitching voltage max.: 75 VDC, 50 VACSwitching current max.: 0.5 A at direct- or alternating voltage and ohmic loadAdjustment range: 10% to 90% of the full scale valueMech. durability: approx.105-106 switching cycles


Switching pressurereversal error: ≤ accuracy classSwitching accuracy: ≤ 1.5 x accuracy classAmbient temperature: -20 °C to + 70 °C

Switching pressurereversal error: max. 2.5% of the spanSwitching accuracy: ≤ 1.5 x accuracy classAmbient temperature: -30 °C to +75 °C

CE-marking Measuring instruments with pneumatic contacts do not belong to the CE-labelling obligation.

Measuring instruments with reed contacts are basi-cally marked with the CE-sign for electromagnetic compatibility.

Options • More than 2 contacts are not available• Instead of the pneumatic low pressure switch (PP-transformer) also a pneumatic/electrical converter can be applied. This is recommendable for the com-bination of pneumatic and electrical instruments and for the monitoring of signals over greater distances, to avoid delays. • The switching functions can be reversed by plugging of P11 / P22

• More than 2 contacts are not available• Single change-over contact R3

P

Reed contact

stream-diffuser-system

actual value pointerlimit setting pointer

controllug

scale

pre-amplifier micro switch

low pressureswitch

hose bridge

output 1.4 bar plug-in nozzle

additional air 1.4 bar G ⅛

AB/MT 9.1000 10/11 11

Limit switch contact assemblies in detaill

Limit switch contact assemblies MS Limit switch contact assemblies eG

Function • The microswitch is a snap switch in which a spring element controls the contacts erratically. It is attached to the movement • Micro switches are basically of the 1-pin change-over contact type. They close or open the electrical circui-tries according to the direction of motion at adjusted limit values.

e-Gauge® is a patented, revolutionary sensor equip-ment for analogue pointer-instruments as pressure gauges and thermometers.• Via angle encoder with inductive tapping the e-Gauge®

transforms almost every pressure gauge and thermo-meter into a switch and transmitter. • The e-Gauge® functions contactless and transforms a „normal“ indicating instrument NSC 100 or 160 with bayonet ring case into a multi-function instrument with 2 digital NPN-switching outputs in series and an out-put signal of 4 – 20 mA. All information concerning the e-Gauge® , especially concerning the analogue output 4-20 mA, can be found on the data sheets of the particular instruments with the final number .93, e.g. bourdon tube pressure gauges RCh 100/160 resp. RChG 100/160 with e-Gauge® data sheet 1201.93.


• Micro switches are especially suitable where a high breaking capacity is required. • Furthermore they stand out due to their vibration sta-bility and their long durability.• Movements with assembled micro switches are only limited suitable for low pressure ranges and have a minor switching accuracy because of the required mi-nimum operating forces.

• Functions absolutely contactless• Nearly no directive force of the measuring unit requi-red, only the weight of the pointer increases slightlydue to the electronic component.• No influence on the indication because of spirals.• Thereby they are also applicable for capsule gauges and bimetal thermometers.• The limit values are programmed.• Both limit values can be programmed so that they switch at the same reference value.

Installation incase-Ø (NCS)

100 100, 160

Case filling Limit switch contact assemblies with micro switchescan only be applied for instruments without case filling because of the externally accessible adjustability.

Limit switch contact assemblies with e-Gauge® can only be applied for instruments with case filling.

Ex-protection – –

Technical data Rated operational voltage: max. 250 V ACSwitching current: max. 5 A (ohmic load) max. 5 A (inductive load, cosφ> 0.75)

Rated operational voltage: 8 - 28 VDCCurrent consumption: max. 50 mABreaking capacity: max. 28 VDC, max. 50 mA


Switching pressure reversal error: accuracy class plus 2-5% of the spanSwitching accuracy: ≤ 1.5 x accuracy classambient temperature: -20 °C to + 70 °C

Switching pressurereversal error: 1% of the spanAmbient temperature: -30°C...+60°C (without case filling)

-20°C...+60°C (with case filling)

Additional output signal: 4 - 20 mA (3-wire)

CE-marking Measuring instruments with micro switch are basi-cally marked with the CE-sign for electromagnetic compatibility and the low voltage directive.

Measuring instruments with e-Gauge are basically marked with the CE-sign for electromagnetic compa-tibility.

Options • 2 contacts upon request • More than 2 contacts are not available• Reaction time devating in 0.01s steps from 0.01s up to 20s• Switching pressure reversal error deviating from 1% in 0.1% steps from 0 to 25% of the final value

e-Gauge

MS

ARMATURENBAU GmbHManometerstraße 5

D – 46487 Wesel–GinderichTel.: +49 (0) 28 03 / 91 30 – 0

Fax: +49 (0) 28 03 / 10 35 [email protected]

http://armaturenbau.dehttp://armaturenbau.com

Tochterfirma und Vertrieb OstSubsidiary Company and Sales East Germany and Eastern Europe

MANOTHERM Beierfeld GmbH Am Gewerbepark 9D – 08344 Grünhain-Beierfeld Tel.: +49 (0) 37 74 / 58 – 0Fax: +49 (0) 37 74 / 58 – [email protected]

http://manotherm.dehttp://manotherm.com

GB10/11 DE

Limit switch contact assemblies -...

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